<template>
  <div class="upload-container">
    <el-button icon='el-icon-upload' size="mini" :style="{background:color,borderColor:color}"
               @click=" dialogVisible=true" type="primary">上传图片
    </el-button>
    <el-dialog append-to-body :visible.sync="dialogVisible">
      <el-upload class="editor-slide-upload"
                 action="http://macro-oss.oss-cn-shenzhen.aliyuncs.com"
                 :data="dataObj"
                 :multiple="true"
                 :file-list="fileList"
                 :show-file-list="true"
                 list-type="picture-card"
                 :on-remove="handleRemove"
                 :on-success="handleSuccess"
                 :before-upload="beforeUpload">
        <el-button size="small" type="primary">点击上传</el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="handleSubmit">确 定</el-button>
    </el-dialog>
  </div>
</template>

<script>
    import {policy} from '@/api/oss'

    export default {
        name: 'editorSlideUpload',
        props: {
            color: {
                type: String,
                default: '#1890ff'
            }
        },
        data() {
            return {
                dialogVisible: false,
                listObj: {},
                fileList: [],
                dataObj: {
                    policy: '',
                    signature: '',
                    key: '',
                    ossaccessKeyId: '',
                    dir: '',
                    host: ''
                }
            }
        },
        methods: {
            checkAllSuccess() {
                return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
            },
            handleSubmit() {
                const arr = Object.keys(this.listObj).map(v => this.listObj[v])
                if (!this.checkAllSuccess()) {
                    this.$message('请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！')
                    return
                }
                console.log(arr);
                this.$emit('successCBK', arr);
                this.listObj = {};
                this.fileList = [];
                this.dialogVisible = false;
            },
            handleSuccess(response, file) {
                const uid = file.uid;
                const objKeyArr = Object.keys(this.listObj)
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        this.listObj[objKeyArr[i]].url = this.dataObj.host + '/' + this.dataObj.dir + '/' + file.name;
                        this.listObj[objKeyArr[i]].hasSuccess = true;
                        return
                    }
                }
            },
            handleRemove(file) {
                const uid = file.uid;
                const objKeyArr = Object.keys(this.listObj);
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        delete this.listObj[objKeyArr[i]];
                        return
                    }
                }
            },
            beforeUpload(file) {
                const _self = this
                const fileName = file.uid;
                this.listObj[fileName] = {};
                return new Promise((resolve, reject) => {
                    policy().then(response => {
                        _self.dataObj.policy = response.data.policy;
                        _self.dataObj.signature = response.data.signature;
                        _self.dataObj.ossaccessKeyId = response.data.accessKeyId;
                        _self.dataObj.key = response.data.dir + '/${filename}';
                        _self.dataObj.dir = response.data.dir;
                        _self.dataObj.host = response.data.host;
                        _self.listObj[fileName] = {
                            hasSuccess: false,
                            uid: file.uid,
                            width: this.width,
                            height: this.height
                        };
                        resolve(true)
                    }).catch(err => {
                        console.log(err)
                        reject(false)
                    })
                })
            }
        }
    }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
  .upload-container .editor-slide-upload {
    margin-bottom: 20px;
  }
</style>
